Robtex

Up: 121.58.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 121.58.96.0/21
Down right: 121.58.104.0/21

IP	Type	Hostname
121.58.97.66	A+PTR	webmail.ichaitangbay.com
121.58.97.77	A	mail.ichaitangbay.com
121.58.104.130	A+PTR	webmail.icsanya.com
121.58.104.194	A+PTR	webmail.sctsanya.com
121.58.104.210	A+PTR	webmail.anantarasanya.com
121.58.105.86	A	mail.wgprlongmubay.com
121.58.105.86	A	wgprlongmubay.com